| 长三角背景点夏季大气PM2.5中正构烷烃和多环芳烃的污染特征和来源解析 |
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| 引用本文： | 薛国艳,王格慧,吴灿,谢郁宁,陈玉宝,李杏茹,王心培,李大鹏,张思,葛双双,丁志健.长三角背景点夏季大气PM2.5中正构烷烃和多环芳烃的污染特征和来源解析[J].环境科学,2020,41(2):554-563. |
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| 作者姓名： | 薛国艳 王格慧 吴灿 谢郁宁 陈玉宝 李杏茹 王心培 李大鹏 张思 葛双双 丁志健 |
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| 作者单位： | 华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241;崇明生态研究院,上海 200062,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,首都师范大学化学系分析测试中心,北京 100048,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241,华东师范大学地理科学学院, 地理信息科学教育部重点实验室,上海 200241 |
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| 摘 要： | 为探讨长三角背景点有机气溶胶的污染特征和来源,于2018年夏季在崇明岛进行了为期3个月的PM_(2.5)样品昼夜采集,使用气相色谱-质谱技术分析其中正构烷烃(normal alkanes,n-alkanes)和多环芳烃(polycyclic aromatic hydrocarbons,PAHs)的质量浓度和分子组成,并结合后向轨迹和正交矩阵(positive matrix factorization,PMF)解析其来源.结果表明,观测期间崇明岛PM_(2.5)的质量浓度为(33±21)μg·m~(-3),低于国家空气质量一级标准(GB3095-2012,35μg·m~(-3)),但仍有部分时段污染较重,超标率为35%.其中n-alkanes和PAHs的浓度均值分别为(26±44) ng·m~(-3)和(0. 76±1. 0) ng·m~(-3),污染期(PM_(2.5)≥35μg·m~(-3))比清洁期(PM_(2.5)15μg·m~(-3))高出一个数量级,二者在污染期均呈昼低夜高趋势,而清洁期PAHs昼夜无显著差异,n-alkanes呈现白天大于晚上的特征.分子组成、特征比值及相关性分析显示:PM_(2.5)中67%的n-alkanes来源于化石燃料燃烧,其余为植物排放,PAHs则主要来自化石燃料和生物质燃烧.后向轨迹及PMF的分析结果进一步显示:污染期PAHs主要来自内陆、沿海及长三角地区的机动车与工业排放,贡献了51%,而清洁期受海洋气团控制,PAHs主要来源于船舶排放,贡献了45%,高于燃煤和机动车排放的贡献之和(38%).
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| 关 键 词： | 崇明岛 PM2.5 正构烷烃 多环芳烃(PAHs) 机动车 燃煤 船舶排放 |
| 收稿时间： | 2019/8/2 0:00:00 |
| 修稿时间： | 2019/9/16 0:00:00 |
Pollution Characteristics and Source Apportionment of n-Alkanes and PAHs in Summertime PM2.5 at Background Site of Yangtze River Delta |
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| XUE Guo-yan,WANG Ge-hui,WU Can,XIE Yu-ning,CHEN Yu-bao,LI Xing-ru,WANG Xin-pei,LI Da-peng,ZHANG Si,GE Shuang-shuang and DING Zhi-jian.Pollution Characteristics and Source Apportionment of n-Alkanes and PAHs in Summertime PM2.5 at Background Site of Yangtze River Delta[J].Chinese Journal of Environmental Science,2020,41(2):554-563. |
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| Authors: | XUE Guo-yan WANG Ge-hui WU Can XIE Yu-ning CHEN Yu-bao LI Xing-ru WANG Xin-pei LI Da-peng ZHANG Si GE Shuang-shuang and DING Zhi-jian |
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| Institution: | Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China;Institute of Eco-Chongming, Shanghai 200062, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Analytical and Testing Center, Department of Chemistry, Capital Normal University, Beijing 100048, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China,Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China and Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 200241, China |
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| Abstract: | |
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| Keywords: | Chongming Island PM2 5 n-alkanes polycyclic aromatic hydrocarbons (PAHs) vehicle exhaust coal burning ship emission |
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